• The Journal of Sustainable Design and Educational Environment Research
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• v.21 no.1
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• pp.24-39
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• 2022

This study was conducted to provide implications so that teachers' voices are heard in the social consensus for future schools by exploring teachers' needs for future school spaces. A qualitative study was performed to listen to teachers' voices directly, and 10 teachers from "A" Elementary School (tentative name) participated in the study. The study 1) recognized the emergence of learning that transcends time and space, and emphasized the importance of an ICT-based informatization environment that can support such learning, 2) confirmed the characteristics of futuristic school spaces centered on "tradition" and "technology," 3) recognized the importance of learning community spaces, 4) emphasized "variable" classrooms for flexible teaching and learning activities, and 5) confirmed the need to introduce eco-friendly elements and provide support for those who may be vulnerable in high-tech learning environments. Finally, the study concluded that teachers need systematic education and experiences that contain sufficient important discourses related to future schools such as "eco-friendliness" and "connection with local communities".

• Explosives and Blasting
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• v.40 no.4
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• pp.35-46
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• 2022

While the construction of dismantling the old industrial complex and restoring the dismantled industrial site to its original natural environment the is underway. In this paper, we introduce a case of dismantling a turbine building which one of the a large steel frame structures in an old industrial complex by applying the progressive collapse method among the blasting demolition methods. We used a charge container that generates a metal jet to cut dismantling the turbine building. The thickness of the steel structure was adjusted to 30 mm or less by applying gouging, which was a method of digging deep grooves by gas and oxygen flames or arc thermal, in the part where the cutting thickness was thick in the blasting section. The total amount of charge used for the blasting of turbine building was 175 kg, 165 electronic detonators and 124 charge containers. As a result of the blasting demolition, the turbine building was collapsed precisely according to the estimated direction. The blasting demolition was completed without causing any damage to the surrounding facilities.

• Journal of Korea Spatial Information System Society
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• v.3 no.1 s.5
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• pp.117-126
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• 2001

We have developed the Mobile Multi Sensor System(MMSS) for the data construction of 4S application and for basic technology acquisition of mobile mapping system in Korea. Using this MMSS, we will collect the information of road and road facilities for DB creation and also construct the Digital Elevation Model(DEM) as ancillary data in urban area. The MMSS consist of the integrated navigation sensor, DGPS & IMU, and digital CCD camera set. In the S/W aspect, we developed the post-processing components for extracting the 3D coordinate information (Spatial Information) and the client program for the MMSS user group. In this paper, we will overview the MMSS constitution and post-processing program, and introduce the utilization plan of MMSS.

• The Bulletin of The Korean Astronomical Society
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• v.45 no.1
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• pp.46.3-47
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• 2020

Variations in the brightness of asteroids are caused by their spins, irregular shapes and companions. Thus, in principle, the spin state and shape model of a single object or, a combined model of spins, shapes and mutual orbit of a multiple components can be constructed from the analysis of light curves obtained from the time-series photometry. Using ground- and space-based facilities, a number of time-series photometric observations of asteroids have been conducted to find the possible causes of their light variations. Nonetheless, only about 2% of the known asteroids have been confirmed for their rotation periods. Therefore, a follow-on systematic photometric survey of asteroids is essential. We started an asteroid light curve survey for this purpose using Korea Microlensing Telescope Network (KMTNet) during 199 nights between the second half of 2019 and the first half of 2020. We monitored within a 2° × 14° region of the sky per each night with 25 min cadences. In order to observe as many asteroids as possible with a single exposure, we mostly focus on the ecliptic plane. In our survey, 25,925 asteroids were observed and about 8,000 of them were confirmed for their rotation periods. In addition, using KMTNet's 24-hour continuous monitoring, we collected many composite light curves of slow rotating asteroids that were rarely obtained with previous observations. In this presentation, we will introduce the typical light curves of asteroids obtained from our survey and present a statistical analysis of spin states and shapes of the asteroids from this study.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.26 no.5D
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• pp.755-761
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• 2006

Though freight origin and destination data is essential for analysing transport investment and planning logistics facilities, the study on the establishment of the freight origin and destination data is very rare. The purpose of this study is to introduce a method on weight and expansion of sample freight data focusing on the Seoul metropolitan area. In particular, this study suggests the weight and expansion method which consider truck and commodity tonnage together. This paper also discuss the origin and destination trips in Seoul metropolitan area. This paper will contribute to establish more reliable freight origin and destination data.

• Journal of the Korean Institute of Rural Architecture
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• v.25 no.3
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• pp.37-45
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• 2023

This study is conducted to provide an empirical review on how schools play a pivotal role in the regional communities. For this, the use of closed schools, activities to revive small-scale schools, and activities related to nearby schools outside the village were analyzed for villages that have participated and have been awarded in the Contest for Making Happy Rural Communities by the Ministry of Agriculture, Food and Rural Affairs. The results of this are as follows. Out of 204 villages that won the contest, there were 19 cases of school closures. Of these 19 cases, there are 17 cases in which the closed school facilities still exist. For the two remaining cases, there are no buildings and only the site remains. To summarize the use of these schools, the functions are being combined and are determined within the range that local residents can operate. The impact or success factors on the region can be summarized into five main categories through the revival of schools in the crisis of closure. First, it was an opportunity to lay an organizational foundation for village projects in the future by reorganizing the village's organization, such as the formation of a village promotion committee to revive the schools. Second, it did not just introduce outsiders to increase the population, but supported housing and jobs for them to successfully settle down. Third, a cultural community was created with senior and junior residents, and finally, the residents became teachers or formed a village education communities such as lifelong education. In the relationship with schools existing outside the village, activities with members of the surrounding schools and linked activities are being carried out in the sense of "school".

• Economic and Environmental Geology
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• v.56 no.5
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• pp.557-564
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• 2023

Nuclear materials such as uranium are used as fuel for nuclear power generation, but there is a high possibility that they will be used for non-peaceful purposes, so international inspections and regulations are being conducted. Isotope analysis data of fine particulate obtained from nuclear facilities can provide important information on the origin and concentration method of nuclear material, so it is widely used in the field of nuclear safety and nuclear forensics. In this study we describe the analytical method that can directly identify nuclear particles and measure their isotopic ratios for fine samples using a large-geometry secondary ion mass spectrometer and introduce its preliminary results. Using the U-200 standard material, the location of fine particles was identified and the results consistent with the standard value were obtained through microbeam analysis.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.23 no.1
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• pp.112-122
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• 2024

Recently, as unmanned aerial vehicle technology such as drones has developed, there are many environmental, social and economic benefits, but if there is malicious intent against important national facilities such as airports, public institutions, power plants, and the military, it can seriously affect national safety and people's lives. It can cause damage. To respond to these drone threats, attempts are being made to introduce detection equipment such as RF scanners. In particular, power transmission towers installed in substations, power plants, and Korea's power system can affect detection performance if the transmission tower is located in the RF scanner detection path. In the experiment, a commercial drone was used to measure the signal intensity emitted from the drone and confirm the attenuation rate. The average and maximum attenuation rates showed similar trends in the 2.4 GHz and 5.8 GHz bands, and were also affected by the density of the structure.

• Korean Journal of Construction Engineering and Management
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• v.25 no.5
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• pp.55-62
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• 2024

The purpose of this study is to analyze the effectiveness and necessity of improvement for the currently implemented education and training in order to cultivate and secure excellent construction engineers of domestic construction companies, and to suggest future improvement measures. The conclusions obtained through this study are as follows. The overall satisfaction of construction engineers at the construction site was high, and it was found to be effective in improving job skills, but the educational content, educational methods, and educational environment need to be improved. In order to improve the educational content, it is urgent to introduce a practical-oriented educational curriculum to respond to technological development. In order to increase the educational effect of online education methods, it is very important to develop excellent educational content. In order to improve the educational environment, it is necessary to expand customized practice spaces, establish educational facilities by region, and operate shuttle buses.

• Journal of the Korea Organic Resources Recycling Association
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• v.17 no.2
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• pp.51-58
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• 2009

In this paper checked up biomass which occurs in the Jeju as are classified as organic waste for integrated management system for review and circulation of resources. Biomass which occurs in the Jeju was the 10,818 tons of sludge, 61,284 tons of food-waste, 1,519,000 tons of livestock. Sludge is treated marine discharge, food-waste is treated regeneration and livestock is treated in the form of recycling. How to establish "System used by mechanism of recycling management on biomass resources" to introduce biomass town created by Hita-city, Oita-ken in Japan. Also there established a model system to building for recycling management of biomass and then checked up the economics. According to the report, it has the difference in facilities, but it will switch to a surplus in 4 years, therefore it was confirmed that the economy. To be considered priority most livestock in "System used by mechanism of recycling management on biomass resources" in Jeju. So it is introduced the urgent problem and the problem awaiting solution on treating livestock in this study.